Winding drum



Aug. 18, 1964 G. ENGEL 3,144,996

WINDING DRUM Filed Oct. 8, 1962 1/1 zen for United States Patent 3,144,996 WINDING DRUM Georg Engel, Essen, Germany, assignor to Beteiligungsund Patentverwaltungsgesellschaft mit beschranhter Haftung, Essen, Germany, a corporation of Germany Filed Oct. 8, 1962, Ser. No. 229,083 Claims priority, application Germany Oct. 12, 1961 3 Claims. (Cl. 24272.1)

The present invention relates to a winding drum with an axially displaceable step-core.

Winding drums with axially displaceable step-cores are known in which the step-core, on which the spreader segments for distending the strip to be coiled or decoiled are disposed, is displaced in a hollow shaft. The latter is rigidly mounted in axial direction in these winding drums and the segments to be displaced by the step-core are supported against the hollow shaft. This construction has the drawback, that the hollow shaft is ditficult to manufacture and is, therefore, expensive. Further more, the true turning exactness leaves much to be de sired due to the double mounting of the hollow shaft and of the step-core in the hollow shaft.

Winding drums have also been proposed before, in which the step-core is formed as a sleeve, which is movable on the drum shaft. The displacement of the step-core in axial direction must then take place by means of a device, which comprises substantially a rod which projects through the hollow drum shaft. Due to the hollowing of the drum shaft, the latter is extremely weakened, so that this construction does not live up to the rough rolling mill operation.

Finally a construction is also known, in which the axially immovably mounted drum shaft is formed simultaneously as a step-core. The tension-segments mounted on the step-core are thereby tensioned and released, respectively, by axial displacement. The displacement of the tension-segments takes place also in this structure by a rod projected through the hollowed drum shaft which rod is laterally connected with the individual segments. In this structure, the operative rod can receive, however, only a predetermined thickness, if the rigidity of the drum shaft should not be too much impaired. Furthermore, in this structure the tension segments are displaced not only radially, but also axially, whereby the coils, mounted thereon for winding or unwinding, respectively, are damaged or can also be displaced from the drum center.

It is, therefore, one object of the present invention to provide a winding drum with an axially displaceable step-core, which avoids these drawbacks and creates a simple and safely operating structure for winding drums with an axially displaceable step-core.

It is another object of the present invention to provide a winding drum with an axially displaceable step-core, which includes an arrangement according to which the step-core is mounted axially movable in the immovable housing and the tension segments, which are mounted on the step-core and secured in axial direction, are supported against the immovable housing by means of a thrust bearing. Suitably, the displacement of the drum shaft, formed as a step-core is brought about by means of a preferably hydraulic displacement device operated by a pressure medium. It is advantageous, if the presice sure cylinder is rigidly connected with the immovable housing of the winding drum. The displaceable drum shaft formed as a step-core, can then be supported in axial direction on the piston of the displacement device by another thrust bearing.

With these and other objects in view, which will become apparent in the following detailed description, the pres ent invention will be clearly understood in connection with the accompanying drawings, in which the only figure is a cross-section of a winding drum with a dis placeable drum shaft formed as a stepcore.

Referring now to the drawing, a foundation 1 is provided on which a housing 2 rests. A drum shaft 3 formed as a step-core is received in the housing 2 and is mounted on roller bearings 4 and 5. The latter, which suitably are formed as self-aligning radial roller bearings, are locked in position in axial direction by threadedly mounted rings 41:, St: on the drum shaft 3 against corresponding shoulders of the drum shaft 3.

Tension segments 7 are arranged on the front portion 6 of the drum shaft 3, which is set off in three steps. The tension segments 7 are connected rigidly with a holding ring 8 movably in the axial direction, yet are movable in the radial direction. The holding ring 8 is connected with the drum shaft 3 by means of a slot and feather 9. An inner ring 12 of a two-row axial bearing 13 is mounted on the holding ring 8 by means of a locking ring 10 and a nut 11. The tension segments '7 are supported in axial direction by means of the axial bearing 13 on the carrying ring 14 of the housing 2. The axial bearing 13 is covered up by a cover 16 secured to the carrying ring 14 by means of screws l5.

The drum shaft 3 is axially movable by means of a hydraulic displacement device consisting of a cylinder 17 and a piston 18. The cylinder 17 is secured to a carrying ring 2% of the housing 2 by means of screws 19, in which also the self-aligning roller bearing 4 is disposed. The self-aligning roller bearing 4 is retained in its operative position by means of the locking ring 4a The drum shaft 3 is supported on the: piston 18 of the hydraulic displacement device by means of a tworow axial bearing 21. The drum shaft 3 is thereby secured with the piston 18 by means of a sleeve 22 screwed on the drum shaft 3 by a proper thread and by means of a cover 23 connected with the sleeve 22 by means of screws 23'.

A driving gear 24 is arranged on the drum shaft 3 for driving the latter.

While I have disclosed one embodiment of the present invention, it is to be understood that this embodiment is given by example only and not in a limiting sense, the scope of the present invention being determined by the objects and the claims.

I claim:

1. A winding drum having an axially displaceable step-core comprising:

an immovable housing,

a shaft mounted for axial movement in and projecting from said housing and including a step-core, a plurality of radially adjustable tension segments engaging said step-core,

a thrust-bearing disposed in said housing and supporting axially said tension segments,

means operatively connected with said shaft for axial displacement of the latter, and

means secured to said shaft and causing rotation of said shaft.

2. The winding drum, as set forth in claim 1, wherein said means operatively connected with said shaft for axial displacement of the latter comprises a hydraulically operating displacement device.

3. The winding drum, as set forth in claim 2, wherein said hydraulically operating displacement device comprises a pressure cylinder and a piston reciprocating therein to constitute two cooperating elements,

References Cited in the file of this patent UNITED STATES PATENTS 2,352,580 Wettengel June 27, 1944 2,394,503 Wilson Feb. 5, 1946 2,394,505 Schroeder Feb. 5, 1946 2,989,263 Smeets June 20, 1961 

1. A WINDING DRUM HAVING AN AXIALLY DISPLACEABLE STEP-CORE COMPRISING: AN IMMOVABLE HOUSING, A SHAFT MOUNTED FOR AXIAL MOVEMENT IN AND PROJECTING FROM SAID HOUSING AND INCLUDING A STEP-CORE, A PLURALITY OF RADIALLY ADJUSTABLE TENSION SEGMENTS ENGAGING SAID STEP-CORE, A THRUST-BEARING DISPOSED IN SAID HOUSING AND SUPPORTING AXIALLY SAID TENSION SEGMENTS, MEANS OPERATIVELY CONNECTED WITH SAID SHAFT FOR AXIAL DISPLACEMENT OF THE LATTER, AND MEANS SECURED TO SAID SHAFT AND CAUSING ROTATION OF SAID SHAFT. 